Is regret meaningful?

Regret is something inherent within human nature which seems to have a specific and essential purpose.
It is a strong impression of negative emotions onto past memories where the person in question had negative or undesirable experiences.
However, it should not, at the same time, be so prevalent in your life that it is debilitating.
Like sass said, it is good to keep it until you have learned your lesson, but afterwards, it is rather pointless to keep, and should be released, so that it does not build up too much in your mind.

Jam it back in, in the dark.

Originally Posted by Megalith

Most of you are speaking as if regret can be easily turned off. It ain't that simple.

Not intending to sound like some after school special or something, but if you do not believe that you can set the regret aside, then you will have problems setting it aside. However, if you fully believe that you can just cast it aside, then you will be capable of it. It is very much akin to the placebo effect. If you "impress" (that is the best term that I can think of to describe this method) upon your thoughts that you must, or must not, feel a certain way, given a certain situation, eventually your brain will rewire itself to conform to this manner of thinking.

There's nowhere I can't reach.